Resin composition for production of optical waveguide, and optical waveguide produced by using the resin composition

Abstract

A resin composition is provided, which satisfies both an uncured layer flexibility requirement and a patterning resolution requirement for production of an optical waveguide by a roll-to-roll process. An optical waveguide produced by using the resin composition is also provided. The resin composition comprises: (A) an aromatic multifunctional epoxy polymer having a weight average molecular weight (Mw) of 500 to 5000; (B) an aromatic multifunctional epoxy polymer having a weight average molecular weight (Mw) of 10000 to 50000; (C) at least one of monofunctional, difunctional and trifunctional liquid aromatic epoxy monomers; and (D) a photoacid generator; wherein the components (A), (B) and (C) are present in proportions of 80 to 90 parts by weight, 5 to 15 parts by weight, and 1 to 10 parts by weight, respectively, based on a total of 100 parts by weight of the components (A), (B) and (C).

What is claimed is: 
     
       1. A resin composition for production of an optical waveguide, the resin composition comprising:
 (A) an aromatic multifunctional epoxy polymer having a weight average molecular weight (Mw) of 500 to 5000; 
 (B) an aromatic multifunctional epoxy polymer having a weight average molecular weight (Mw) of 10000 to 50000; 
 (C) at least one of monofunctional, difunctional and trifunctional liquid aromatic epoxy monomers; and 
 (D) a photoacid generator;
 wherein the components (A), (B) and (C) are present in proportions of 80 to 90 parts by weight, 5 to 15 parts by weight, and 1 to 10 parts by weight, respectively, based on a total of 100 parts by weight of the components (A), (B) and (C). 
 
 
     
     
       2. The resin composition as set forth in  claim 1 , further comprising an oxetane monomer. 
     
     
       3. An optical waveguide comprising:
 a core portion for transmission of a light signal; and 
 a cladding portion; 
 wherein at least one of the cladding portion and the core portion is formed from a resin composition as recited in  claim 1 .